Bartonellosis - Bartonella henselae

Bartonella are
bacteria that live inside cells; they can infect humans and other mammals. It is
mainly carried by cats and causes cat-scratch disease, endocarditis, and
several other serious diseases in humans. Bartonella bacteria are known to be
carried by fleas, body lice and ticks. Scientists suspect that ticks are
a source of infection in some human cases of bartonellosis. People with tick
bites and no known exposure to cats have acquired the disease.